Toggles are not focusable or switchable from the keyboard #56
Description
When filling in a basic HTML form, some users prefer to use only the keyboard, tabbing through the fields and entering values. Normal checkboxes can be toggled by hitting space when they're in focus.
The toggle elements in this project don't set tab index, so they're not focusable from the keyboard. They would need styling to show when they're focused, and key events should be forwarded to the hidden checkbox element.